DaprLego for Microservices

Mark ChmarnyPrincipal Program ManagerOffice of CTO, Azure@mchmarny

Context

Gap between existing code and modern architecture

increasingly larger

Platforms have narrow language support, tightly

controlled feature sets

Runtimes target specific infrastructure, limit portability

without rewrite

Developer Friction

Dapr

Distributed Application Runtime

dapr.io

Dapr project transitioningto open governance

github.com/dapr

11Releases

10MImage Pulls

>450Contributors

70+Components

7.8KGitHub Stars

1Year

Dapr Design Principles

Opt-inBuilding Blocks

Any LanguageAny Framework

Idiomatic, Based onCommon Practices

Consistent, Portable,Open APIs

Platform AgnosticVM, Cloud, BM, Edge

Extensibleand Pluggable

Dapr

Building

BlocksService

invocationState

managementPublish

SubscribeResourcebindings

Virtualactors

Observability Secrets

Any Cloud, VM, Bare-meta, or Edge Infrastructure

HTTP API gRPC API

Any Code or Framework

Dapr Logical LayersDistributed Application Runtime

Secrets

Streamlined and secure access to

application secrets

Observability

Automatic view logs, metrics, and traces across components

and networked services

VirtualActors

Durable code and data

encapsulation in reusable actor

objects

ResourceBindings

Event triggers, resource bindings from and to wide arrays of external

resources

Publish/ Subscribe

Scalable, secure, and reliable messaging

between services

State Management

Key/value statemanagement for

long running, stateless, and

stateful services

Dapr Building Blocks

ServiceInvocation

Discovery, secure, service-to-service

method calls across protocols

State stores

Publish & subscribe

Resource bindingsScanning

for events

Dapr APIDapr API

Messaging

Load and save state

Servicecode B

Servicecode A

Input/output

Appl

icat

ion

Sidecar Sidecar

Secure with mTLS

Dapr Sidecar Architecture

Tracing, logsand metrics

Tracing, logsand metrics

Application

Dapr SidecarKubernetes Standalone (self-hosted) apiVersion: apps/v1kind: Deploymentmetadata:name: my-applabels:app: my-app

spec:selector:matchLabels:app: my-app

template:metadata:labels:app: my-app

annotations:dapr.io/enabled: "true"dapr.io/app-id: "my-appr"dapr.io/app-protocol: ”http"dapr.io/app-port: ”8080”

…

dapr run --app-id my-app \--app-protocol grpc \--app-port 50105 \--components-path ./config \go run main.go

dapr run --app-id my-app \--app-protocol http \--app-port 3000 \--components-path ./config \node app.js

dapr run --app-id my-app \--app-protocol http \--app-port 5678 \--components-path ./config \./my-exe

1

PodPod

Updatecomponent changes

Updates actor partition placement

Injects Daprruntime

Dapr Components

Manages

Components

Any modern Kubernetes cluster in the Cloud, in your Datacenter

Publish & subscribe

State stores

Resource bindingsInput/outputPod

C O N T A I N E R

Actor Placement

Pod

C O N T A I N E R

Sidecar Injector

Pod

C O N T A I N E R

Operator

Dapr APIHTTP or gRPC

Uses Components

C O N T A I N E R

Sidecar

C O N T A I N E R

Application code

Pod

C O N T A I N E R

Sentry

Certificate authority

Distributed Tracing

Prometheus AppInsightts Jaeger

Secured with mTLSto/from sidecar

Readiness andliveness probeon healthz API

Kubelet

Dapr on Kubernetes

Dapr Building Blocks

App“my-app”

{"name": "Tatooine"

}

GEThttp://localhost:3500/v1.0/state/<store-name>/planet

POSThttp://localhost:3500/v1.0/state/<store-name>

[{"key": "weapon","value": "DeathStar"

}, {"key": "planet","value": {

"name": "Tatooine"}

}]

key value

my-app-weapon "DeathStar"

my-app-planet { "name": "Tatooine"

}

Key/value state managementDapr building blocks

Backed by state storeof your choice

apiVersion: dapr.io/v1alpha1kind: Componentmetadata:

name: corpdbspec:

type: state.mongodbmetadata:- name: host

value: headless.mongo.svc.cluster.local:27017- name: username

value: user1- name: password

secretKeyRef:name: mongo-secretkey: mongodb-password

- name: databaseNamevalue: orders

- name: collectionNamevalue: processed

POST/v1.0/state/corpdb

GET/v1.0/state/corpdb/<key>

DELETE/v1.0/state/corpdb/<key>

POST (Get bulk) /v1.0/state/corpdb/bulk

POST / PUT (Save multiple)/v1.0/state/corpdb/transaction

Key/value state managementDapr building blocks

”app1"

”app2"

HTTPhttp://localhost:3500/v1.0/invoke/cart/method/checkout

{"user":"johndoe","cart":"0001"

}

gRPC 10.0.0.2:50001/InvokeService/checkout

{"user":"johndoe","cart":"0001"

}

Service discovery and invocationDapr building blocks

curl -H "Content-Type: application/json” -d '{ "arg1": 10, "arg2": 23}' \http://localhost:3500/v1.0/invoke/myService/method/myMethod?param1=a&parm2=1

SubscribePublish

POSThttp://localhost:3500/v1.0/publish/

"topic":"order","data":{

"user":"johndoe","item":"ZeroDay"

},

“cart”

Publish and subscribeDapr building blocks

“shipping”

POSThttp://10.0.0.5:8005/order

"data":{"user":"johndoe","item":"ZeroDay"

}

“email”

POSThttp://10.0.0.4:8004/order

apiVersion: dapr.io/v1alpha1kind: Componentmetadata:name: orders

spec:type: pubsub.redismetadata:- name: redisHostvalue: leader.redis.svc.cluster.local:6379

- name: redisPasswordsecretKeyRef:name: redis-secretkey: password

- name: allowedTopicsvalue: ”processed,audit"

POST/v1.0/publish/orders/processed

GET (programmatic discover)/dapr/subscribe

Supports both programmatic and declarative subscriptions

POST (to the app)/any/path/defined/in/subscription

Publish and subscribeDapr building blocks

App"my-app"

GET / POSThttp://localhost:8000/trigger

{"user":"johndoe"

}

Redis

Kafka

SQS

Twitter

Resource bindings: inputDapr building blocks

{“operation”: “query”"data": “SELECT A,B from C”

}

POSThttp://localhost:3500/v1.0/bindings/my-binding

App“my-app”

DynamoDB

Redis

Kafka

Twilio

Event Hubs

CosmosDB

Resource bindings: outputDapr building blocks

apiVersion: dapr.io/v1alpha1kind: Componentmetadata:name: my-kafka

spec:type: bindings.kafkametadata:- name: brokersvalue: "http://localhost:5050"

- name: topicsvalue: ”submitted"

- name: publishTopicvalue: ”processed"

- name: consumerGroupvalue: "group1"

OPTIONS/POST (Input)/my-kafka

POST/PUT (Output)/v1.0/bindings/my-kafka

Resource bindingsDapr building blocks

Secret Stores

GEThttp://localhost:3500/v1.0/secrets/vault/my-secret

Applicationcode

my-secret “supersecret”

SecretsDapr building blocks

apiVersion: dapr.io/v1alpha1kind: Componentmetadata:name: my-secrets

spec:type: secretstores.hashicorp.vaultmetadata:- name: vaultAddrvalue: https://127.0.0.1:8200

- name: caCertvalue: "ca_cert"

- name: caPathvalue: ”/certs/cert.pem"

- name: caPemvalue: "/certs/ca.pem"

…

GET/v1.0/secrets/my-secrets/redis-password

Some secret stores support parameters in query (for metadata (e.g. version)

SecretsDapr building blocks

- name: redisPasswordsecretKeyRef:name: my-secretskey: redis-password

And in config

App InsightsAzure Monitor

Datadog

Instana

Jaeger

SignalFX

Prometheus

Observability: metrics, distributed tracingDapr building blocks

App“frontend”

App“backend”

OpenCensus

Pod Y

Actor C

Actor D

Pod X

Actor A

Actor B

POSThttp://localhost:3500/v1.0/actors/MyActors/C/method/update

{"speed":"1"

}

Virtual actorsDapr building blocks

App

Placementservice

Determine actor node placement

POSThttp://10.0.0.6:6004/update

{"speed":"1"

}

InvokeActor

Allocate

POSThttp://10.0.0.7:6005/update

{"speed":"3"

}

SDKs & Frameworks

HTTP API

gRPC API

SDKs

Dapr SDKs & FrameworksLanguage-specific Convenience Layers

Functions

ASP.NET Core

Logic Apps

Spring Boot

Server Side Blazor

Frameworks

Demo

DemoEvent processing pipeline

TweetProcessor

save tweets/v1.0/state/tweets

input binding/tweets

Sidecar

Twitter API

DemoEvent processing pipeline

TweetProcessor

save tweets/v1.0/state/tweets

SentimentScorer

invoke sentiment service method/v1.0/invoke/sentimenter/method/score

publish scored tweets/v1.0/publish/processed

input binding/tweets

Sidecar Sidecar

Twitter API

DemoEvent processing pipeline

TweetProcessor

save tweets/v1.0/state/tweets

SentimentScorer

TweetViewer

invoke sentiment service method/v1.0/invoke/sentimenter/method/score

publish scored tweets/v1.0/publish/processed

input binding/tweets

Sidecar Sidecar Sidecar

UITwitter API

Event Processing Pipeline Demo

bit.ly/cncf-dapr

Dapr Integrations

• v0.11

• Stable APIs

• Access control, service identity

• External security audit (CNCF-certified company)

• Kicked off project transition to open governance

• Next, most likely, v1.0 RC by EOY

• Address friction from real-world use-cases

• Test infra (performance, conformance, long running tests…)

• Start seating the Technical and Steering Committee (TSC)

• Ensure general readiness for production grade workloads

Dapr Areas of Focus

Chatgitter.im/dapr

Twitter@daprdev

Anything Elsemchmarny@microsoft.com

Videosbit.ly/dapr-videos

Daprdapr.io

Projectgithub.com/dapr